How to do "NumPad ." on a mac
I am not using mac, but I think I can help you.
First go to Edit-&gt;Preferences-&gt;Keymap.
And then select Key-Binding:

Now you can search for the shortcut that you want (in this case you will search for &quot;.&quot;) and change it to whatever you want.
I hope it works for you.